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72
af de sædvanlige Lag og adskiller sig ikke. i saa Henseende
fra den foregaaende Arts Hud.
I Corium ere forskjelligformede Kalklegemer leirede.
I det ydre Lag findes de under Jeffreysii beskrevne
stjerne-dannede Grupper, der bestaa i Regelen af 5 spatelformede
Kalkstave. fra hvis Midte Ankeret rager frem. Fig. 34.
Kun ere disse Grupper i langt større Mængde tilstede, og
ere stillede i næsten regelmæssige Rækker hos denne Art.
Kalkspatlernes Skaft er noget kortere. Bladet noget
mindre, men mere afrundet og forsynet med flere Huller, Fig.
34, a. Ankerstokken er noget kortere og tykkere, og paa
Kløernes ydre Rand er der 4 Takker. Fig. 34. b. Disse
stjernefWmige Kalklegemer ere indesluttede i særegne
Papiller, der dannes af Bindevævet og ere beklædte med
Epithelet og Cuticula; kun Ankeret rager med sin yderste
Ende udenfor Papillen.
Ved Siden af disse Legemer, dels i Niveau med dem,
dels noget dybere i Bindevævet, sees. foruden de
almindelige gjennembrudte Kalkplader med Krone, hvilke dog hos
denne Art er i saa høi Grad uregelmæssige med Hensyn
til Formen, at det er vanskeligt at finde 2—3, der
fuldkommen ligne hverandre, endnu andre Kalklegemer, der
ere ganske særegne. De bestaa af "et Midtparti, hvorfra
udgaa som oftest 3, stundom 4 Stammer; disse dele sig
atter i 2 Grene, som løbe snart lige ud, snart krumme de
sig noget, og kun sjeldent forene de sig, Fig. 31. 32, 33.
Fra Centnim hæver sig en Slags Krone, der
hyppig ender som en spids Naal, men som ogsaa ofte har en
bredere Ende, forsynet med 3 afrundede Knuder, Fig. 31,
a’. Begge disse Slags Kroner, der gaa igjennem
Papiller-nes Aabning. ere beklædte med en Bindevævsskede, som
naar op imod Enden, og udenpaa hvilken er Epithel- og
Cuticulalaget. Imellem disse Kalklegemer ligge paa enkelte
Steder af Ryggen et og andet -yderst lidet, næsten rundt
Kalkkorn. der har en mørk-vinrød Farve; men under det,
eller rettere indenfor, altsaa i et dybere Lag af Corium,
iagttages en stor Mængde farvefrie Kalklegemer, der ere
mere eller mindre afrundede og bestaa af et Conglomerat
af Kalkkorn eller Kalkprismer. Fig. 35, 36. I Bindevævet
findes desforuden temmelig meget grønligt Pigment, der
ligger i uregelmæssige Klumper.
Fordøielsesorganerne frembyde intet Særegent. Kun
det venstre Tarmappendix er noget længere, end paa
Jeffreysii, og er næsten lige fra dets Udspring besat med
Smaablærer, Fig. 30, b.
Det indre Skelet. Kalkringen, er ligesom hos
Jeffreysii fuldstændig forkalket, saa at det ikke er muligt at skille
de enkelte Stykker fra hverandre; imidlertid kunne
Sømmene temmelig tydeligt iagttages under Loupen. Det er
muligt, at Kammene, saavel paa Radial- som
Interradial-• stykkerne, ere mere fremspringende, og Spidserne paa den
perceptible. — the viscera however less so. The
integument is composed of the usual layers, and in this respect
does not differ from the skin in the foregoing species.
In the corium are embedded calcareous corpuscles,
varying in form. In the outer layer occur the stellate
groups observed in Jeffreysii, consisting as a rule of 5
spatu-late calcareous rods, from the middle of which protends
the anchor, fig. 34. . These groups are. however, far more
numerous in the present species, and are ananged in almost
regular series. The shaft of the calcareous spatulæ is
somewhat shorter, the lobule somewfiat smaller, but more rounded
and furnished with a greater number of apertures,. fig. 33, a.
The- stock of the anchor is a trifle shorter and thicker,
and on the outer margin of the anns are seen 4 spines,
fig. 34, b. These stellate calcareous corpuscles lie enclosed
in special papillæ, consisting of connective tissue, and are
covered by the epithelium and the cuticle; the anchor only
projects with its outer extremity above the papilla.
Approximating these corpuscles, either in the same
plane or embedded somewhat deeper in the connective
tissue, are seen, exclusive of the more numerous
perforate calcareous plates with corollæ, — which however in
this species vary so much with regard to form that it is
difficult to find two or three exactly alike, — other
calcareous corpuscles, essentially distinct. They consist of a
central portion, from which proceed generally 3,
sometimes 4 stems, that divide dichotomouslv. the 2 branches,
sometimes straight, sometimes slightly bent, seldom
uniting, figs. 31; 32; 33. From the centre springs a kind
of corolla, which frequently terminates in a sharp spicule,
but which, too, has often a broader extremity,
furnished with 3 rounded protuberances, fig. 31, a. Both
kinds of corollæ, which pass through the opening of
the papillæ. have a sheath of connective tissue, that
reaches up towards the extremity, and is covered by the
epithelial and cuticular layers. Between these calcareous
corpuscles occur on certain parts of the back one or two
extremely small, almost round calcareous granules, of a dark
vinous red ; but underneath the granules, or rather lower
down, in a deeper layer of the corium, are seen large
numbers of colourless calcareous corpuscles, more or less
rounded, and consisting of an agglomeration of calcareous
granules, or calcareous prisms, tigs. 35: 36. In the
connective tissue also occurs a .considerable quantity of a
greenish pigmentary substance, distributed in irregular
lumps.
The digestive organs exhibit no peculiar feature. The
left intestinal appendix, however, is somewhat longer than
in Jeffreysii, and is beset, almost from its origin, with small
vesicles, fig. 30, b.
The calcareous skeleton — the calcareous ring — is,
as in Arikyr. Jeffreysii, completely calcined, and hence it
is quite impossible to separate one from the other the
segments composing it; the sutures, however, when viewed
under a lens, appear comparatively distinct. . Possibly, the
combs both on the radial and the interradial segments project
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